Removing Ashes; Air Intake Control - Osburn Beyond Fire 1700 Installation And Operation Manual

Raking the coals is useful for two reasons. First, it brings them near where most of the combustion
air enters the firebox. This will ignite the new load quickly. Secondly, the charcoal will not be
smothered by the new load of wood. When the embers are simply spread inside the combustion
chamber, the new load smoulder for a long time before igniting.
Close the air control only when the firebox is full of bright turbulent flames, the wood is charred,
and its edges are glowing.
The heater should not be left unattended during ignition and the fire should not burn at full
intensity for more than a few minutes.
When lighting a new load, the appliance produces a heat surge. This heat surge is pleasant when
the room temperature is cool but can be unpleasant when the room is already warm. Therefore,
it is best to let each load of wood burn completely so that the room cools down before putting
a load of wood back on.
5.5

Removing Ashes

Ash should be removed from the firebox every two to three days of full time heating. Ash
should not accumulate excessively in the firebox since it will affect the proper operation of the
appliance. The best time to remove ash is in the morning, after an overnight fire when the heater
is relatively cold, but there is still a little chimney draft to draw the ash dust into the heater and
prevent going out into the room.
Ashes almost always contain live embers that can stay hot for days and which release carbon
monoxide gas. Ashes should be placed in a tightly covered metal container. The container must
be placed on a non-combustible floor or on the ground well away from all combustible materials.
If the ashes are disposed of by burial in soil or otherwise locally dispersed, they should be kept
in a closed metal container until they are completely cooled. No other waste should be placed
in this container.
NEVER STORE ASHES INDOORS OR IN A NON-METALLIC CONTAINER
OR ON A WOODEN DECK.
CENDRES
ASHES
5.6

Air Intake Control

Once the firewood, firebox and chimney are hot, air intake can be
reduced to achieve a steady burn.
As the air intake is reduced, the burn rate decreases. This has the
effect of distributing the thermal energy of the fuel over a longer period
of time. In addition, the flow rate of exhaust through the appliance
and flue pipe slows down, which increases the duration of the energy
transfer of the exhaust gases. As the air intake is reduced, the flame
slows down.
If the flames diminish to the point of disappearing, the air intake has
been reduced too early in the combustion cycle or the wood used is
too wet. If the wood is dry and the air control is used properly, the
flames should decrease, but remain bright and stable.
Page 22 Installation and Operation Manual - 1700